Quite an easy achievement but may take some luck. First I recommend turning off cross play to make it easier. In case you haven't noticed there is bots in this game, along with real players. Your goal for this achievement is to hunt down the bots, they are very easy to kill, they pretty much don't move and miss you all the time, so just go for them. You can tell it's a real person if they move around a lot and jump a lot. I easily got 10+ kills a game just killing them and staying away from real players.
Alternatively this will most likely come naturally once you have a good game when working towards the other achievements.